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Hi , i`m Jack
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About that white center icon flashing , can you give me the number of long and short flashes ?
By the way it may take a few minutes between replies
Sorry but never mind the automated phone offers , that was from the website , not from me and it would not help one bit right now
you mean you forced the tv on with that procedure ?
With the volume + and channel down procedure all you do is defeat the protect circuit , its not a reset and does not fix anything
How is the screen looking while its on ?
Are there darker areas ?
That code points to a lamp / panel error as I`m sure you are aware
If you want to enter the service menu you press VOL - and INPUT (not chan up) while you press the power button or plug in the power cord.
I have to step out for a bit , take a look at the manual at the link below in the mean time ;
click the link below and if that link opens a login window popup then just close it with the upper corner X or the "no thanks . continue to view"The manual is behind that , use the download button once its opened .https://www.dropbox.com/s/2mz53awh340l6og/sharp_lc-40_46_52_60le830u_832u_835u_le831u%20%284%29.pdf?dl=0
Hope that the manual will help , especially the troubleshooting table on page 69 and on .
In your opening post you did not have questions just a statement of what you did so far so I figure you already know that this points to a panel problem and on hand troubleshooting is what would be required now.
If you don`t have any questions for now then please do take the time to rate my answer by clicking on the star icons at the top, then click on Submit , this is how I make a living and that rating gets me paid for my time.Also note that it will not close this post , you can come back here at any time if you have questions.Thanks for understanding .
By the way , got some new info on this problem ;
If the only way you can turn the tv on is by the force procedure and the screen displays evenly no dark area then replace your main board